This is Randy. I have never seen a healthy relationship that did not include time for oneself to socialize outside the relationship, whether that is a "night out with the girls/boys", a sporting event with a child, or a dive trip. People in healthy relationships want the other person to pursue their passion, even if they may not share it.
My parents have been married for over 55 years. Many passions and hobbies they share and do together, some they don’t. One has never held the other back from doing something they really were passionate about. They are happy for them.
RJF